Ultrasonic Piezoelectric Transducer Ceramic Ring

Ultrasonic Piezoelectric Transducer Ceramic Ring

Ultrasonic Piezoelectric Transducer Ceramic Ring 200kHz Ultrasonic Piezoelectric Transducer Ceramic Ring OD50.45mm*ID9.28mm 200KHZ barium titanate piezo ceramic disc fish finder piezo Ultrasonic piezoelectric transducer ceramic ring paramter: Demension: Φ50.45mm×Φ9.28mm Fm (KHz): 200KHz ±3KHz C...

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Ultrasonic Piezoelectric Transducer Ceramic Ring

200kHz Ultrasonic Piezoelectric Transducer Ceramic Ring OD50.45mm*ID9.28mm 200KHZ barium titanate piezo ceramic disc fish finder piezo

Ultrasonic piezoelectric transducer ceramic ring paramter:

ParameterΦ50.45mm×Φ9.28mm
Fm (KHz)200KHz±3KHz
C (pF)1650±10%
R (Ω)<20
d33≥140
δF>6.5k
tg≤0.7%


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Phase transitional behavior and piezoelectric properties of (Na0.5K0.5)NbO3–LiNbO3 ceramics

Lead-free piezoelectric ceramics (1−x)(Na0.5K0.5)NbO3–xLiNbO3 {[Lix(Na0.5K0.5)1−x]NbO3} (x=0.04–0.20) have been synthesized by an ordinary sintering technique. The materials with perovskite structure is orthorhombic phase at x⩽0.05 and becomes tetragonal phase at x⩾0.07, a phase K3Li2Nb5O15 with tetragonal tungsten bronze structure begins to appear at x=0.08 and becomes dominant with increasing the content of LiNbO3. A morphotropic phase boundary between orthorhombic and tetragonal phases is found in the composition range 0.05<x<0.07. Analogous to Pb(Zr,Ti)O3, the piezoelectric and electromechanical properties are enhanced for compositions near the morphotropic phase boundary. Piezoelectric constant d33 values reach 200–235pC∕N. Electromechanical coefficients of the planar mode and the thickness mode reach 38%–44% and 44%–48%, respectively. The Curie temperatures (TC) of [Lix(Na0.5K0.5)1−x]NbO3 (x=0.04–0.20) are in the range of 452–510°C, at least 100°C higher than that of conventional Pb(Zr,Ti)O3. 

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